You can check your CP version by running the following command on your CP as root:

rpm -qa | grep onapp-cp
CODE

This will give you the version you're running, as shown in this example:

onapp-cp-vnc_proxy-3.0.0-4.el5
onapp-cp-3.2.2-25
onapp-cp-install-3.2-9
CODE

You can also use the API request to check the version of your cloud installation.